View Full Version : [ubuntu] Harddrive woes

August 10th, 2012, 09:08 AM
Hi guys,

A new problem occurred today that may result in me buying a new hdd.

I ssh's into my home server this morning and i was presented with the fact i cannot do anything. After logging in, running most command results in:

-bash: /bin/su: Input/output error'.

I cannot restart because of this problem so I can't try that until later.

fsck results in:

fsck from util-linux 2.20.1
e2fsck 1.42 (29-Nov-2011)
fsck.ext4: Superblock invalid, trying backup blocks...
fsck.ext4: Bad magic number in super-block while trying to open /dev/mapper/SERVER-root

The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device&gt;

fdisk -l show:

fdisk -l

Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00087990

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 488396799 243947521 5 Extended
/dev/sda5 501760 488396799 243947520 8e Linux LVM
fdisk: unable to read /dev/sdb: Inappropriate ioctl for device

fsck /dev/sda1 shows:

fsck /dev/sda1
fsck from util-linux 2.20.1
e2fsck 1.42 (29-Nov-2011)
/dev/sda1 is mounted.

WARNING!!! The filesystem is mounted. If you continue you ***WILL***
cause ***SEVERE*** filesystem damage.

Do you really want to continue<n>? no

check aborted.

I cannot open /var/log/messages because of the input/output error.

But i can access my usb external HDDs.

Do I have some kind of superblock/partition corruption? Is there anything else I can run to get more information?

August 10th, 2012, 11:54 AM

Should I just buy a new HDD and load my backup onto it? Or is there anything else I can try?

August 10th, 2012, 12:20 PM
So you CAN log into the server but some commands are not working is this correct?

Can you actually see that data on the disk?
If you have physical access to the server can you boot into a live Linux CD and run the checks on the disks?


August 10th, 2012, 12:29 PM
Yes I can log in, but I receive a:

Failed to add entry for user jack.

Last login: Thu Aug 9 19:33:07 2012 from jack

Error. When running 'ls' it doesn't show anything BUT I can traverse the folders???? i.e I can 'cd etc' but I can't see whats there!

I am currently out, but I will be at home later. What checks can I run?

August 12th, 2012, 01:52 AM
Since you cannot run checks on mounted file systems and your root file system may be having problems too, you will need to boot the system using a LiveCD and run disk checks from there.

August 13th, 2012, 09:17 PM
The filesystem might be corrupt, not the actual hardware. Trying reinstalling (backup first!) before buying a new HDD?

August 15th, 2012, 03:13 AM
I've used to ddrescue to save the backup ignorant's bacon several times